In this paper, we present the design of a 874 GHz mixer block-integrated antenna for the ISMAR Instrument. The spline horn antenna with a dielectric lens (Teflon) is used to fulfill the requirement of an on-axis Directivity exceeding 32 dBi. The well designed spline horn offers very high Gaussian Coupling, exceeding 97%. This property of spline horn further helps to achieve very rotationally symmetric beam even after the lens with very low cross-polarization (< -30 dB) as well as low side-lobe levels (< -28 dB). The integrated spline horn with lens has far-field Full Width at Half Maximum of 4.2±0.2° over the frequency range of 860 GHz to 890 GHz. The simulated antenna losses are less than 0.5 dB and the antenna input reflection coefficient including the circular to rectangular waveguide (WR1.2) transition is better than -20 dB.

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BibTeX @conference{Karandikar2015,author={Karandikar, Yogesh B. and Hammar, Arvid and Sobis, Peter and Forsberg, Per and Emrich, Anders and Stake, Jan},title={A 874 GHz Mixer Block Integrated Spline Horn and Lens Antenna for the ISMAR Instrument},booktitle={9th European Conference on Antennas and Propagation, EuCAP 2015, Lisbon, Portugal, 13-17 May 2015},isbn={978-889070185-6},abstract={In this paper, we present the design of a 874 GHz mixer block-integrated antenna for the ISMAR Instrument. The spline horn antenna with a dielectric lens (Teflon) is used to fulfill the requirement of an on-axis Directivity exceeding 32 dBi. The well designed spline horn offers very high Gaussian Coupling, exceeding 97%. This property of spline horn further helps to achieve very rotationally symmetric beam even after the lens with very low cross-polarization (< -30 dB) as well as low side-lobe levels (< -28 dB). The integrated spline horn with lens has far-field Full Width at Half Maximum of 4.2±0.2° over the frequency range of 860 GHz to 890 GHz. The simulated antenna losses are less than 0.5 dB and the antenna input reflection coefficient including the circular to rectangular waveguide (WR1.2) transition is better than -20 dB.},year={2015},keywords={Gaussian Coupling, Spline Horns, Lens, ISMAR, mixer},}

RefWorks RT Conference ProceedingsSR PrintID 215294A1 Karandikar, Yogesh B.A1 Hammar, ArvidA1 Sobis, PeterA1 Forsberg, PerA1 Emrich, AndersA1 Stake, JanT1 A 874 GHz Mixer Block Integrated Spline Horn and Lens Antenna for the ISMAR InstrumentYR 2015T2 9th European Conference on Antennas and Propagation, EuCAP 2015, Lisbon, Portugal, 13-17 May 2015SN 978-889070185-6AB In this paper, we present the design of a 874 GHz mixer block-integrated antenna for the ISMAR Instrument. The spline horn antenna with a dielectric lens (Teflon) is used to fulfill the requirement of an on-axis Directivity exceeding 32 dBi. The well designed spline horn offers very high Gaussian Coupling, exceeding 97%. This property of spline horn further helps to achieve very rotationally symmetric beam even after the lens with very low cross-polarization (< -30 dB) as well as low side-lobe levels (< -28 dB). The integrated spline horn with lens has far-field Full Width at Half Maximum of 4.2±0.2° over the frequency range of 860 GHz to 890 GHz. The simulated antenna losses are less than 0.5 dB and the antenna input reflection coefficient including the circular to rectangular waveguide (WR1.2) transition is better than -20 dB.LA engOL 30